SOUTH CAROLINA ONSITE
WASTEWATER REGULATION:
STANDARDS AND SITE REQUIREMENTS
EXAM 2025/2026 QUESTIONS AND
ANSWERS 100% PASS
Regulation 61-56 - ANS Regulation governing onsite wastewater systems in South Carolina.
Statutory Authority - ANS S.C. Code Sections 44-1-140(11), 44-1-150, 44-55-825, 44-55-827,
and 48-1-10 et seq.
Regulation History - ANS Chronological record of the regulation's publication in the State
Register.
Minimum Site Conditions - ANS Criteria that must be met for onsite wastewater systems.
Primary Treatment Requirements - ANS Minimum requirements for the initial treatment of
wastewater.
Final Treatment and Disposal Systems - ANS Minimum requirements for the final treatment
and disposal of wastewater.
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
,Construction Criteria - ANS Standards that must be followed during the construction of onsite
wastewater systems.
Alternative Infiltration Trench Products - ANS Evaluation criteria for different infiltration
trench products used in wastewater systems.
Wastewater Treatment Facility Accessibility - ANS Standards for the accessibility of
wastewater treatment facilities.
Discharge of Waste - ANS Regulations concerning the discharge of waste from onsite
wastewater systems.
Changes in Use - ANS Regulations regarding changes in use that impact existing onsite
wastewater systems.
System Standard 100/101 - ANS Conventional system with 14-inch aggregate depth.
System Standard 150 - ANS Large systems greater than 1500 gallons per day (gpd) and
community systems.
System Standard 210/211 - ANS Shallow placement system with 9-inch aggregate depth.
System Standard 220/221 - ANS Shallow placement system with six (6)-inch aggregate depth.
System Standard 230/231 - ANS Shallow placement system with 14-inch aggregate depth
with fill cap.
System Standard 240/241 - ANS Ultra-shallow placement system with 6-inch aggregate depth
with fill cap.
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
,System Standard 250/251 - ANS Reservoir infiltration system for soils with expansive clay.
System Standard 260/261 - ANS 9-inch shallow placement system with fill cap.
System Standard 270/271 - ANS Alternative trench width and depth systems.
Appendices of Standards - ANS Additional standards for permitted systems outlined in
appendices.
Application, Permit, Final Inspection - ANS Process involving application, permit issuance,
final inspection, and approval for onsite wastewater systems.
Variances and Exemptions - ANS Conditions under which variances and exemptions may be
granted for onsite wastewater systems.
Reservoir Infiltration System for Soils with Expansive Clay - ANS Appendix J - System Standard
280/281
Alternative Trench Width and Depth Systems with Fill Cap - ANS Appendix K - System
Standard 290/291
Shallow Placement with Fill Cap for Sites with Shallow Class IV Soil - ANS Appendix L - System
Standard 370/371
Double Aggregate Depth Wastewater Infiltration Trenches - ANS Appendix M - System
Standard 380/381
Mounded Infiltration System - ANS Appendix N - System Standard 420/421
Mounded Fill System - ANS Appendix O - System Standard 431
3 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, Elevated Infiltration System - ANS Appendix P - System Standard 601
Specialized Onsite Wastewater System Designs (less than 1500 gpd) - ANS Appendix Q -
System Standard 610
Curtain Drain Standard - ANS Appendix R
Nonwater-Carried Sewage Treatment Systems - ANS Appendix S
Wastewater Combustion Systems - ANS Appendix T
Gray Water Subsurface Reuse Systems - ANS Appendix U
Long-Term Acceptance Rate Standard for Onsite Wastewater Systems - ANS 500
Peak Sewage Flow Rate Standard - ANS 501
Onsite Wastewater Pump System Standard - ANS 502
Minimum Design Standards for Tank Construction - ANS 503
Fiberglass Reinforced Plastic Tanks Standard - ANS 504
Thermoplastic Tanks Standard - ANS 505
License to Clean Onsite Wastewater Systems, Self-Contained Toilets, and Other Sewage Holding
Systems - ANS 600
4 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
WASTEWATER REGULATION:
STANDARDS AND SITE REQUIREMENTS
EXAM 2025/2026 QUESTIONS AND
ANSWERS 100% PASS
Regulation 61-56 - ANS Regulation governing onsite wastewater systems in South Carolina.
Statutory Authority - ANS S.C. Code Sections 44-1-140(11), 44-1-150, 44-55-825, 44-55-827,
and 48-1-10 et seq.
Regulation History - ANS Chronological record of the regulation's publication in the State
Register.
Minimum Site Conditions - ANS Criteria that must be met for onsite wastewater systems.
Primary Treatment Requirements - ANS Minimum requirements for the initial treatment of
wastewater.
Final Treatment and Disposal Systems - ANS Minimum requirements for the final treatment
and disposal of wastewater.
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
,Construction Criteria - ANS Standards that must be followed during the construction of onsite
wastewater systems.
Alternative Infiltration Trench Products - ANS Evaluation criteria for different infiltration
trench products used in wastewater systems.
Wastewater Treatment Facility Accessibility - ANS Standards for the accessibility of
wastewater treatment facilities.
Discharge of Waste - ANS Regulations concerning the discharge of waste from onsite
wastewater systems.
Changes in Use - ANS Regulations regarding changes in use that impact existing onsite
wastewater systems.
System Standard 100/101 - ANS Conventional system with 14-inch aggregate depth.
System Standard 150 - ANS Large systems greater than 1500 gallons per day (gpd) and
community systems.
System Standard 210/211 - ANS Shallow placement system with 9-inch aggregate depth.
System Standard 220/221 - ANS Shallow placement system with six (6)-inch aggregate depth.
System Standard 230/231 - ANS Shallow placement system with 14-inch aggregate depth
with fill cap.
System Standard 240/241 - ANS Ultra-shallow placement system with 6-inch aggregate depth
with fill cap.
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
,System Standard 250/251 - ANS Reservoir infiltration system for soils with expansive clay.
System Standard 260/261 - ANS 9-inch shallow placement system with fill cap.
System Standard 270/271 - ANS Alternative trench width and depth systems.
Appendices of Standards - ANS Additional standards for permitted systems outlined in
appendices.
Application, Permit, Final Inspection - ANS Process involving application, permit issuance,
final inspection, and approval for onsite wastewater systems.
Variances and Exemptions - ANS Conditions under which variances and exemptions may be
granted for onsite wastewater systems.
Reservoir Infiltration System for Soils with Expansive Clay - ANS Appendix J - System Standard
280/281
Alternative Trench Width and Depth Systems with Fill Cap - ANS Appendix K - System
Standard 290/291
Shallow Placement with Fill Cap for Sites with Shallow Class IV Soil - ANS Appendix L - System
Standard 370/371
Double Aggregate Depth Wastewater Infiltration Trenches - ANS Appendix M - System
Standard 380/381
Mounded Infiltration System - ANS Appendix N - System Standard 420/421
Mounded Fill System - ANS Appendix O - System Standard 431
3 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, Elevated Infiltration System - ANS Appendix P - System Standard 601
Specialized Onsite Wastewater System Designs (less than 1500 gpd) - ANS Appendix Q -
System Standard 610
Curtain Drain Standard - ANS Appendix R
Nonwater-Carried Sewage Treatment Systems - ANS Appendix S
Wastewater Combustion Systems - ANS Appendix T
Gray Water Subsurface Reuse Systems - ANS Appendix U
Long-Term Acceptance Rate Standard for Onsite Wastewater Systems - ANS 500
Peak Sewage Flow Rate Standard - ANS 501
Onsite Wastewater Pump System Standard - ANS 502
Minimum Design Standards for Tank Construction - ANS 503
Fiberglass Reinforced Plastic Tanks Standard - ANS 504
Thermoplastic Tanks Standard - ANS 505
License to Clean Onsite Wastewater Systems, Self-Contained Toilets, and Other Sewage Holding
Systems - ANS 600
4 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
